Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : June 24, 2020 - June 26, 2020
Elastic vibration of a railway vehicle carbody causes deterioration of ride comfort since the natural frequency of the vibration below about 10 Hz is the frequency range that is known to be a sensitive frequency range for human. Vibration reduction methods for the elastic vibration below about 10 Hz of that have been researched to improve the ride comfort. However, in recent years, the vibration in a frequency region above 10 Hz also causes deterioration of ride comfort along with speed up of railway vehicle. Therefore, it is necessary to understand vibration characteristic in a high frequency region to research vibration reduction methods. At first, this paper describes the vibration experiment of a Shinkansen type carbody in a stationary position. In the experiment, with the wireless three axis accelerometers to understand the detailed elastic vibration characteristics in high frequencies, the accelerations at the floor and the roof were measured at more points than in the usual. As a result, it is confirmed that the carbody vibrates with the three-dimensional vibration shapes and has the complex vibration characteristics in the high frequency region above 10 Hz. In addition, it is found that the wireless accelerometer enables us to measure the accelerations of the floor and the roof more easily than a conventional wired accelerometer.
